How Much Knockdown Power Is Required?
12-30-2002, 05:18 PM
#1
Spike
Thread Starter
Join Date: Feb 2003
Location: Georgia
Posts: 5
How Much Knockdown Power Is Required?
I have always used a .30-06 for hunting whitetail deer. Recently I have wanted to go with a smaller caliber for this purpose. How much knockdown power/energy is required for taking whitetails humanely? What is the formula for calculating knockdown energy of a specific bullet size and type?
12-30-2002, 07:24 PM
#3
Join Date: Feb 2003
Location: VA USA
Posts: 570
RE: How Much Knockdown Power Is Required?
I don't believe in anything called "knock down power", but you can calculate the energy of a bullet by the following formula. http://www.airgunning.co.uk/tech.htm
As far as the minimum required, that's highly debatable.
As far as the minimum required, that's highly debatable.
12-30-2002, 07:57 PM
#4
Nontypical Buck
Join Date: Feb 2003
Location: Oakland OR USA
Posts: 2,929
RE: How Much Knockdown Power Is Required?
I remember reading some articles by self proclaimed experts that set between 700 to 800 ft lbs energy as a minimuim . sounds reasonable but it is debatable to say the least . I guess a lot would depend on where you hit them .
12-30-2002, 08:17 PM
#5
Typical Buck
Join Date: Feb 2003
Location: Free Union, VA
Posts: 750
RE: How Much Knockdown Power Is Required?
I recall several years ago before I quit hunting (started back again this year) there was a minimum foot lbs of somewhere around 300-350 lbs required for the firearm here in VA. it also had to be larger than .223. Thist year when I was prepping I didn't see the foot lbs requirement. It my crossbow only produces about 45 ft lbs. But I took a nice doe with it. I know that my 9 mm pistol has a muzzle velocity of around 350 ft lbs. I am sure many will disagree, but I have no doubt that I could make a clean kill on a deer with my 9 mm. If I can get close enough with a bow, I can definately get close enough with a pistol. It's more than just Ft Lbs. it's depth of penetration, bullet placement, initial diameter and expansion.
David
Yeah, I know I kicked open the hornets nest on this one
David
Yeah, I know I kicked open the hornets nest on this one
12-30-2002, 08:19 PM
#6
Giant Nontypical
Join Date: Feb 2003
Location: PA
Posts: 9,085
RE: How Much Knockdown Power Is Required?
my mom bought me a giant book about hunting from field and stream a few years ago and it agrees with quilly and halcon..800ft/lbs of energy is recommended for killing deer...
12-30-2002, 08:28 PM
#7
Nontypical Buck
Join Date: Feb 2003
Location: Pulaskiville
Posts: 3,533
RE: How Much Knockdown Power Is Required?
People that write books will use numbers like 775 ft-lbs and such, but they are meaningless. Many a moost has been shot behind the front shoulder with a .22lr and found handily. Hell, my bow doesn't produce 350 ft-lbs of energy and I've killed 30+ deer with it.
If you poke a hole in the right place, the deer will die. If you don't, you shouldn't be hunting. 22 Magnums are legal in Maine for a reason...
The key is to choose an adequate caliber and learn to shoot it properly. Personally, I'd pick the .243 as the bottom and work up from there.
If you poke a hole in the right place, the deer will die. If you don't, you shouldn't be hunting. 22 Magnums are legal in Maine for a reason...
The key is to choose an adequate caliber and learn to shoot it properly. Personally, I'd pick the .243 as the bottom and work up from there.
12-30-2002, 08:38 PM
#8
Boone & Crockett
Join Date: Feb 2003
Posts: 10,679
RE: How Much Knockdown Power Is Required?
Don't get too hung up on energy requirements for deer. More important is the bullet type. 1000 ft.lbs. with a hollow point match bullet isn't the same as 1000 ft.lbs. with a hunting bullet. I know that's basic, but it's important. Anything from a .223 on up will be able to humanely take whitetails at 200 yards.
12-30-2002, 10:56 PM
#10
Giant Nontypical
Join Date: Feb 2003
Location: fort mcmurray alberta canada
Posts: 5,667
RE: How Much Knockdown Power Is Required?
It varies a great deal with the size of deer you hunt.In the south a 200lb deer may be considered very large while mature northern bucks often exceed 300 lbs.In any case a cartridge such as the 25-06 or 7mm-08 is more than adequate for any deer.
